John d



tait@ gieten diter @ffice JOHN D. LANE, 0F NEW YRK, N. Y., ASSIGNOR TO I-IORIGE ,EVERETI OF PHILADELPHIA, PENNSYLVANIA.

Letters Patent '.No.' 76,474, dated April 7, 1868.

IMPROVEMENT IN THE MANUFAGTURE OI' TIN BOXES.

To'ALL WHOM 1T MAY concurrir:l

Be it known that I, J'OHN D. LANE, vof the city, county, and State of New York, have invented an Improvement in Blocking-Boxes; and I do hereby -declare the following to be a full," clear, and exact description of the same, reference being had to the accompanying drawing, and to the letters of reference marked thereon.

My invention consists of the lower portion of a blacking-box, the flange of which is turned up from and forms a part of the bottom, and is rolled and indented, all as described hereafter, so as to form an available flange, by a much more economical operation than that heretofore practised.

In order to enable others skilled in the manufacture o t' articles of this class to make my invention, I will now proceed to describe the manner of carrying it into effect. On reference to the accompanying drawing, which forms a part of this specification- I A Figure 1 is a sectional view of the improved box, with the upper portion or lid applied to the body, and

Figure 2 a plan view of thelcwer portion of the box.

Similar letters refer to similar parts throughout both views. v

In the 4manufacture of blacking-boxes, of tinned plates, it has been usual to make the lids by forcing disks of the plate through dies, so as to turn down the edge and form a llange for overlapping the lower portion of the bo.\the latter consisting of a disk of tinned plate, the' edges of which are secured to a ring, forming av deep flange, to be overlapped by the flange ofthe lid.

The most expensive item in the manufacture of ordinary blacking-boxes has been the making of the lower portions, the manipulations required in fastening together the ends of the ring which forms the flange, and in securing the latter tothe disk which forms the bottom, rendering the manufacture on thc old plan a matter of serious expense in establishments where large numbers of these boxes are required. The flange of the lower portion of the box being deeper than that of the lid, and having to sustain the internal pressure ofthe contents, it has heretofore been deemed necessary to make the said flange of the lower portion in the costly manner described, instead of forming it in one piece witl the bottom, as in making the lid. I have, however, found that a substantial and uniform ilange may be formed on the lower portion ofthe box, by making it ofthe same piece as the bottom.

In the drawing, A represents the lower' portion ofthe box, and B the'lid, the latter heilig made in the usual way, that is, by forcing a disk of tinned plate through dies, and thus forming the shallow flange, which overlaps the flange ofthe lower portion A ofthebox, as best observed on reference to g. I. In making the lower portion Al of the boer, I, in the first place, adopt precisely the same plan as in forming the lid, that is, I force a disk of tinned plate through dies, thereby turning up the ange,which is of the same piece as the bottom. The flange, however, as thus far completed, is of such a depth, and so ragged and wrinkled, and wanting in uniformity, that it is not in proper condition to receive the lid; hence another operation becomes necessary. This is the formation of an annular indent-ation, b, in the .inside of the flange, and a correspond ing projection on the outside, .by subjecting the flange to the action of suitable rollers.

This operation, which i`s rapidly accomplished, serves the twofold purpose of imparting uniformity to the flange, and of permanently strengthening the same, by forming on it the annular projection described.

l I claim as my invention, and desireLto secure by Letters Paten-tlhe lower portion of a blacking-hox, having a llan'ge turned up from and forming a part of'the bottom, and that flange rolled and indented, all as described for the purpose specified.

JOHN D. LANE.

Witnesses:

WM. F. McNaMARA, ALEX. F. Renners.' 

